<template>
  <el-menu :default-active="activeMenu" mode="horizontal" @select="handleSelect" :ellipsis="false">
    <template v-for="(item, index) in topMenus">
      <el-menu-item :style="{'--theme': theme}" :index="item.path" :key="index" v-if="index < visibleNumber">
        <svg-icon :icon-class="item.meta ? item.meta.icon : '' " /> {{ item.meta?.title }}
      </el-menu-item>
    </template>

    <!-- 顶部菜单超出数量折叠 -->
    <el-sub-menu :style="{'--theme': theme}" index="more" v-if="topMenus.length > visibleNumber">
      <template #title>更多菜单</template>
      <template v-for="(item, index) in topMenus">
        <el-menu-item :index="item.path" :key="index" v-if="index >= visibleNumber">
          <svg-icon :icon-class="item.meta ? item.meta.icon : '' " /> {{ item.meta?.title }}
        </el-menu-item>
      </template>
    </el-sub-menu>
  </el-menu>
</template>

<script setup lang="ts">
import { constantRoutes } from '@/router'
import { isHttp } from '@/utils/validate'
import useAppStore from '@/store/modules/app'
import useSettingsStore from '@/store/modules/settings'
import usePermissionStore from '@/store/modules/permission'
import { RouteOption } from 'vue-router'

// 顶部栏初始数
const visibleNumber = ref<number>(-1)
// 当前激活菜单的 index
const currentIndex = ref<string>()
// 隐藏侧边栏路由
const hideList = ['/index', '/user/profile']

const appStore = useAppStore()
const settingsStore = useSettingsStore()
const permissionStore = usePermissionStore()
const route = useRoute()
const router = useRouter()

// 主题颜色
const theme = computed(() => settingsStore.theme)
// 所有的路由信息
const routers = computed(() => permissionStore.topbarRouters)

// 顶部显示菜单
const topMenus = computed(() => {
  let topMenus:RouteOption[] = []
  routers.value.map((menu) => {
    if (menu.hidden !== true) {
      // 兼容顶部栏一级菜单内部跳转
      if (menu.path === '/') {
        topMenus.push(menu.children? menu.children[0] : menu)
      } else {
        topMenus.push(menu)
      }
    }
  })
  return topMenus
})

// 设置子路由
const childrenMenus = computed(() => {
  let childrenMenus:RouteOption[] = []
  routers.value.map((router) => {
    router.children?.forEach((item) => {
      if (item.parentPath === undefined) {
        if(router.path === '/') {
          item.path = '/' + item.path
        } else {
          if(!isHttp(item.path)) {
            item.path = router.path + '/' + item.path
          }
        }
        item.parentPath = router.path
      }
      childrenMenus.push(item)
    })
  })
  return constantRoutes.concat(childrenMenus)
})

// 默认激活的菜单
const activeMenu = computed(() => {
  const path = route.path
  let activePath = path
  if (path !== undefined && path.lastIndexOf('/') > 0 && hideList.indexOf(path) === -1) {
    const tmpPath = path.substring(1, path.length)
    activePath = '/' + tmpPath.substring(0, tmpPath.indexOf('/'))
    if (!route.meta.link) {
      appStore.toggleSideBarHide(false)
    }
  } else if(!route.children) {
    activePath = path
    appStore.toggleSideBarHide(true)
  }
  activeRoutes(activePath)
  return activePath
})

const setVisibleNumber = () => {
  const width = document.body.getBoundingClientRect().width / 3
  visibleNumber.value = parseInt(String(width / 85))
}

const handleSelect = (key: string) => {
  currentIndex.value = key
  const route = routers.value.find(item => item.path === key)
  if (isHttp(key)) {
    // http(s):// 路径新窗口打开
    window.open(key, '_blank')
  } else if (!route || !route.children) {
    // 没有子路由路径内部打开
    const routeMenu = childrenMenus.value.find(item => item.path === key)
    if (routeMenu && routeMenu.query) {
      let query = JSON.parse(routeMenu.query)
      router.push({ path: key, query: query })
    } else {
      router.push({ path: key })
    }
    appStore.toggleSideBarHide(true)
  } else {
    // 显示左侧联动菜单
    activeRoutes(key)
    appStore.toggleSideBarHide(false)
  }
}

const activeRoutes = (key: string) => {
  let routes:RouteOption[] = []
  if (childrenMenus.value && childrenMenus.value.length > 0) {
    childrenMenus.value.map((item) => {
      if (key == item.parentPath || (key == 'index' && '' == item.path)) {
        routes.push(item)
      }
    })
  }
  if(routes.length > 0) {
    permissionStore.setSidebarRouters(routes)
  } else {
    appStore.toggleSideBarHide(true)
  }
  return routes
}

onMounted(() => {
  window.addEventListener('resize', setVisibleNumber)
})
onBeforeUnmount(() => {
  window.removeEventListener('resize', setVisibleNumber)
})

onMounted(() => {
  setVisibleNumber()
})
</script>

<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}

.topmenu-container.el-menu--horizontal > .el-menu-item.is-active, .el-menu--horizontal > .el-sub-menu.is-active .el-submenu__title {
  border-bottom: 2px solid #{'var(--theme)'} !important;
  color: #303133;
}

/* sub-menu item */
.topmenu-container.el-menu--horizontal > .el-sub-menu .el-sub-menu__title {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}
</style>
